* Don't error out if antiPastHashesBetween have 2 blocks with the same blue score
* Prepend lowHash to RPC GetBlocks request
* Add a test for GetHashesBetween
* Add a test for GetBlocks RPC call
* Update antipast.go
Co-authored-by: stasatdaglabs <39559713+stasatdaglabs@users.noreply.github.com>